Giant Rats Trained to Sniff Out Tuberculosis in Africa [+video]

Known for detecting land mines, the rodents could also help detect disease. MAPUTO, Mozambique—On a recent Friday morning, at a laboratory in southern Africa, Tariq correctly identified all six spit samples known to be positive for tuberculosis, the world’s second most fatal infectious disease. Tariq is no scientist, though. He’s a lab rat—an African giant…